IBM 2790 Manual page 50

restart capability to recover deferred data (see "Restart
Number Logging").
• Request Format
S/360 only— Standard response with:
d x and d2— contain the deferred restart number log which
was checkpointed.
• Response
System/360 only— Standard format with the following
values for ' -
6 2
a. Positive—
FO— Recovery normal
b. Negative—
F I— No recovery was necessary. No deferred data had
been sent since the previous checkpoint.
F2 (see Note 1)— A conflict in the status of a message
on the disk was noted but recovery continued to a
normal ending.
F 3— User-program restart-number-logging error. No
recovery attempted.
F4 (see Note 1)— Recovery aborted when non-deferred
data was found in deferred-data queue.
F5 (see Note 1)-End of disk was reached before
completing recovery. Restart was aborted.
Note 1: These are "should not occur" responses;
situations that cause these responses to be generated
will normally be detected as errors during normal
2715 operations which instigate a service call.
X'D5— 2715 Restart
• Function— Attempts to recover data that has been buf­
fered on disk and not yet transmitted to the System/360
after a 2790 system or 2715 hard failure, or stop, has
occurred.
Note: This request assumes an ICPL has occurred since
the failure, and checks to ensure that the 2790 input is
stopped. For the proper recovery o f data, the 2790
input must not be started after the ICPL. •
• Request Format
System/360— Standard format with:
dj and d2— contain the deferred-restart-number log.
d and d4-contain the priority restart-number log. (See
3
'Restart Number Logging')
CE Panel— Standard format with no additional data used.
50
• Response Format
System/360 requests— Standard format with:
a. Positive— r and r each contain X'F0' for no unusual
2 3
conditions detected (normal completion code).
b. Negative-r = completion code for deferred data
2
queues; r = completion code for priority data queues.
3
The completion codes are:
FO-Completion normal
F I-S om e data was located but the queue may be
incomplete.
F2— No data was located.
F — Some data was located but the queue may be
5
incomplete and a disk error occurred.
F - N data was located and a disk error occurred.
6 0
c. Invalid-Standard format with:
r = F , and no data recovery attempted.
2 8
CE panel request:
a. Positive— Standard format (X'D5F0').
b. Invalid-Catalog number X'0042' is contained in the
display register.
X'D6'-Scan Area Station/Adapter Errors (Maintenance
I
Function)
• Function— Causes the 2715 error-logout file to be scanned.
I Error statistics are extracted per the AS or adapter ad­
dress specified. Two output messages are formatted,
each summarizing four errors.
• Request Format
System/360— Standard format.
• Response Format
Note: These messages are routed to the System/360
for console printout only if no 2740 is available for
output on the 2715.
Response:
SOH % C XSTX [Text]
Text consists of a routing byte (user specified) followed
by error information extracted for the specified area
I station or adapter.
X'D7'— Send Partial Error Log (Maintenance Function)
• Function— Causes error data in the 2715 error-logout
message assembly area to be transmitted to the Sys­
tem/360.
ETX